U.S. patent number 11,331,936 [Application Number 16/284,180] was granted by the patent office on 2022-05-17 for spindle and recording device.
This patent grant is currently assigned to Seiko Epson Corporation. The grantee listed for this patent is SEIKO EPSON CORPORATION. Invention is credited to Shun Ito.
United States Patent |
11,331,936 |
Ito |
May 17, 2022 |
Spindle and recording device
Abstract
To provide a spindle supporting a roll body on which a
sheet-shaped medium is wound and rotationally driving the roll
body. The spindle includes a shaft member to be inserted into the
roll body, a gear fixed on a tip side of the shaft member in an
axial direction, a spacer member contacting both of the shaft
member and the gear, and a coupling member coupling the shaft
member to the gear. In the axial direction of the shaft member, a
contact area of the spacer member and the gear is larger than a
contact area of the shaft member and the spacer member. The gear is
coupled to the coupling member in the axial direction and the shaft
member is coupled to the coupling member in an intersecting
direction intersecting the axial direction.
Inventors: |
Ito; Shun (Shiojiri,
JP) |
Applicant: |
Name |
City |
State |
Country |
Type |
SEIKO EPSON CORPORATION |
Tokyo |
N/A |
JP |
|
|
Assignee: |
Seiko Epson Corporation (Tokyo,
JP)
|
Family
ID: |
1000006312792 |
Appl.
No.: |
16/284,180 |
Filed: |
February 25, 2019 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20190263154 A1 |
Aug 29, 2019 |
|
Foreign Application Priority Data
|
|
|
|
|
Feb 26, 2018 [JP] |
|
|
JP2018-031639 |
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B65H
19/126 (20130101); B41J 15/06 (20130101); B41J
15/02 (20130101); B41J 15/042 (20130101) |
Current International
Class: |
B41J
15/02 (20060101); B41J 15/04 (20060101); B41J
15/06 (20060101); B65H 19/12 (20060101) |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Marini; Matthew G
Assistant Examiner: Ferguson-Samreth; Marissa
Attorney, Agent or Firm: Workman Nydegger
Claims
What is claimed is:
1. A spindle configured to support a roll body on which a sheet-
shaped medium is wound and rotationally drive the roll body, the
spindle comprising: a shaft member to be inserted into the roll
body; a gear fixed on a tip side of the shaft member in an axial
direction; a spacer member provided at a position between the shaft
member and the gear, and contacting the shaft member and the gear;
and a coupling member coupling the shaft member to the gear,
wherein in the axial direction, a first contact area, where the
spacer member and the gear are in contact with each other, is
larger than a second contact area, where the spacer member and the
shaft member are in contact with each other, and the gear is
coupled to the coupling member in the axial direction and the shaft
member is coupled to the coupling member in an intersecting
direction intersecting the axial direction.
2. The spindle according to claim 1, further comprising: a
penetration member penetrating through the shaft member and the
coupling member, wherein the gear includes an insertion part into
which an outer circumferential part of the shaft member is to be
inserted, the shaft member includes a first through-hole
penetrating in the intersecting direction at a position where the
outer circumferential part is inserted into the insertion part, the
coupling member includes a second through-hole penetrating in the
intersecting direction and is arranged such that the second
through-hole is housed inside the shaft member, the penetration
member protrudes from the outer circumferential part and penetrates
through the first through-hole and the second through-hole, and the
insertion part includes a regulation part configured to regulate
movement of the penetration member protruded from the outer
circumferential part in a rotation direction of the roll body.
3. The spindle according to claim 2, wherein the regulation part is
at least one groove along the axial direction.
4. The spindle according to claim 3, wherein the penetration member
is a spring pin, and an outer diameter of the spring pin in a state
in which the spring pin is not penetrating through the first
through-hole and the second through-hole is larger than an outer
diameter of the spring pin in a state in which the spring pin is
penetrating through the first through-hole and the second
through-hole.
5. A recording device, comprising: the spindle according to claim
4; and a recording part configured to perform recording on the roll
body supported by the spindle.
6. A recording device, comprising: the spindle according to claim
3; and a recording part configured to perform recording on the roll
body supported by the spindle.
7. The spindle according to claim 2, wherein the penetration member
is a spring pin, and an outer diameter of the spring pin in a state
in which the spring pin is not inserted into the first through-hole
and the second through-hole is larger than an outer diameter of the
spring pin in a state in which the spring pin is inserted into the
first through-hole and the second through-hole.
8. A recording device, comprising: the spindle according to claim
7; and a recording part configured to perform recording on the roll
body supported by the spindle.
9. A recording device, comprising: the spindle according to claim
2; and a recording part configured to perform recording on the roll
body supported by the spindle.
10. A recording device, comprising: the spindle according to claim
1; and a recording part configured to perform recording on the roll
body supported by the spindle.
Description
BACKGROUND
1. Technical Field
The present invention relates to a spindle and a recording
device.
2. Related Art
Various recording devices have been used. Among these devices,
there is a recording device including a spindle configured to
support a roll body on which a sheet-shaped medium has been wound.
As spindles that can be used for this kind of recording device,
spindles of various configurations have been disclosed.
For example, JP-UM-A-58-154259 discloses a roll paper winding shaft
(spindle) that includes a toothed gear (gear) transmitting a
rotation force and that can support and wind a roll paper (medium
roll body) by inserting a shaft (shaft member) into the roll paper
and attaching side plates (flange parts).
However, in a known spindle as disclosed in JP-UM-A-58-154259, in a
case that a big and heavy roll body is used or in a case that the
spindle is dropped by mistake, there is a case that the spindle is
deformed, such as a case that the gear is buckled or a case that
the shaft member is inclined with respect to the gear. When the
spindle is deformed, there is a case that medium transportation
accuracy is reduced.
SUMMARY
An advantage of some aspects of the invention is to suppress the
deformation of a spindle configured to support a roll body on which
a sheet-shaped medium has been wound.
The spindle according to a first aspect of the invention is a
spindle configured to support a roll body on which a sheet-shaped
medium is wound and rotationally drive the roll body, the spindle
including a shaft member to be inserted into the roll body, a gear
fixed on a tip side of the shaft member in an axial direction, a
spacer member provided at a position between the shaft member and
the gear, and contacting the shaft member and the gear, and a
coupling member coupling the shaft member to the gear, wherein in
the axial direction, a contact area of the spacer member and the
gear is larger than a contact area of the shaft member and the
spacer member, and the gear is coupled to the coupling member in
the axial direction and the shaft member is coupled to the coupling
member in an intersecting direction intersecting the axial
direction.
According to the aspect, the spindle includes a spacer member and
is configured such that the contact area of the spacer member and
the gear is larger than the contact area of the tip of the shaft
member and the spacer member in the axial direction of the shaft
member. That is, the contact area of the tip of the shaft member
and the gear via the spacer member is larger than the contact area
of the tip of the shaft member and the gear in a configuration
without the spacer member. Thus, it is possible to reduce the load
of the shaft member applied to the gear and suppress the buckling
of the gear. In addition, the gear is coupled to the coupling
member in the axial direction, and the shaft member is coupled to
the coupling member in an intersecting direction intersecting the
axial direction. That is, the shaft member and the gear are fixed
to each other via the coupling member in the axial direction and
the intersecting direction intersecting the axial direction. By
fixing the shaft member and the gear to each other in the axial
direction and the intersecting direction, it is possible to
suppress the inclination of the shaft member with respect to the
gear. Thus, according to the aspect, it is possible to suppress the
deformation of the spindle.
The spindle according to a second aspect of the invention is the
spindle according to the first aspect, further including a
penetration member penetrating through the shaft member and the
coupling member, wherein the gear includes an insertion part into
which an outer circumferential part of the shaft member is to be
inserted, the shaft member includes a first through-hole
penetrating in the intersecting direction at a position where the
outer circumferential part is inserted into the insertion part, the
coupling member includes a second through-hole penetrating in the
intersecting direction and is arranged such that the second
through-hole is housed inside the shaft member, the penetration
member protrudes from the outer circumferential part and penetrates
through both of the first through-hole and the second through-hole,
and the insertion part includes a regulation part configured to
regulate the movement of the penetration member protruded from the
outer circumferential part in a rotation direction of the roll
body.
According to the aspect, it is possible to position the coupling
member in the shaft member with high accuracy by the penetration
member, and effectively regulate the movement of the penetration
member (i.e., shaft member) with respect to the gear in the
rotation direction of the roll body by the regulation part.
The spindle according to a third aspect of the invention is the
spindle according to the second aspect, wherein the regulation part
is at least one groove along the axial direction.
According to the aspect, since the regulation part is at least one
groove along the axial direction, it is possible to effectively
regulate the movement of the shaft member with respect to the gear
in the rotation direction of the roll body with the simple
configuration.
The spindle according to a fourth aspect of the invention is the
spindle according to the second or third aspect, wherein the
penetration member is a spring pin, and an outer diameter in a
state in which the spring pin is not inserted into the first
through-hole and the second through-hole is larger than an outer
diameter in a state in which the spring pin is inserted into the
first through-hole and the second through-hole.
According to the aspect, the penetration member is a spring pin
configured such that an outer diameter in a state in which the
spring pin is not penetrating through the first through-hole and
the second through-hole is larger than an outer diameter in a state
in which the spring pin is penetrating through the first
through-hole and the second through-hole. Thus, it is possible to
easily position the gear with respect to the shaft member with high
accuracy by the spring pin.
The recording device according to a fifth aspect of the invention
includes the spindle according to any one of the first to fourth
aspects, and a recording part configured to perform recording on
the roll body supported on the spindle.
According to the aspect, the deformation of the spindle is
suppressed, the reduction of medium transportation accuracy is also
suppressed accordingly, and thus, it is possible to perform
recording on a medium transported with high transportation
accuracy.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described with reference to the accompanying
drawings, wherein like numbers reference like elements.
FIG. 1 is a schematic perspective view of a recording device
according to an example of the invention.
FIG. 2 is a schematic perspective view of the recording device
according to the example of the invention.
FIG. 3 is a schematic perspective view of the entirety of the
spindle of the recording device according to the example of the
invention.
FIG. 4 is a schematic perspective view of part of the spindle of
the recording device according to the example of the invention.
FIG. 5 is a schematic perspective view of part of the spindle of
the recording device according to the example of the invention.
FIG. 6 is a schematic perspective view of part of the spindle of
the recording device according to the example of the invention.
FIG. 7 is a schematic perspective view of the gear of the spindle
of the recording device according to the example of the
invention.
FIG. 8 is a schematic cross-sectional view of part of the spindle
of the recording device according to the example of the
invention.
FIG. 9 is an enlarged schematic cross-sectional view of part of the
spindle of the recording device according to the example of the
invention.
FIG. 10 is an enlarged schematic cross-sectional view of part of
the spindle of the recording device according to the example of the
invention.
FIG. 11 is a schematic view for describing the spring pin of the
spindle of the recording device according to the example of the
invention.
DESCRIPTION OF EXEMPLARY EMBODIMENTS
Hereinafter, a recording device 1 according to an example of the
invention will be described in detail with reference to the
accompanying drawings.
First, an overview of the recording device 1 according to the
example will be described with reference to FIG. 1 and FIG. 2.
FIG. 1 and FIG. 2 are schematic perspective views of the recording
device 1 according to the example. Among these figures, FIG. 1
represents a state in which a setting part 2 of a roll body (medium
roll) on which a sheet-shaped medium has been wound is covered by a
cover 3. In addition, FIG. 2 represents a state in which a support
part 5 is made to support a spindle 4 that can support a medium
roll.
Note that, in FIG. 1 and FIG. 2, some components are represented in
dashed lines or omitted such that structures can be easily
understood.
Here, an X direction in the figure is a horizontal direction and
also a direction in which a shaft member 4c of the spindle 4
extends, a Y direction is the horizontal direction and also a
direction orthogonal to the X direction, and a Z direction is a
vertical direction. In addition, hereinafter, an arrow direction is
a +direction, and an opposite direction to the arrow direction is a
-direction. For example, a vertically upper direction is a +Z
direction, and a vertically lower direction is a -Z direction. In
addition, a medium transportation direction is approximately a +Y
direction.
The recording device 1 according to the example is a recording
device that can perform recording on a roll body on which a
sheet-shaped medium has been wound. As represented in FIG. 2, the
recording device 1 according to the example includes the setting
part 2 including support parts 5 (support part 5a and support part
5b) that can support the spindle 4 configured to support a medium
roll body.
In addition, as represented in FIG. 1, the recording device 1
according to the example includes a head carriage 7 moving in a
reciprocating direction (X direction or -X direction) intersecting,
or orthogonal to the transportation direction of the medium. The
recording device 1 according to the example is configured such that
the recording device 1 can perform recording on a medium set in the
setting part 2 and transported from the setting part 2 along
approximately the +Y direction by discharging an ink from a
recording head retained in the head carriage 7.
As described above, in the recording device 1 according to the
example, the spindle 4 is made to support the medium roll body. In
addition, the spindle 4 supporting the roll body is set in the
setting part 2. Here, the spindle 4 in the example includes a shaft
member 4c made of metal, and a gear 4d made of resin (see FIG. 3,
etc.) fixed to an end part 4a on one side (-X direction side) of
the shaft member 4c in the axial direction and having a larger
outer diameter than the outer diameter of the shaft member 4c. In
addition, the spindle 4 is configured such that the spindle 4 can
support the medium roll body in a state in which the shaft member
4c has been inserted into the roll body. The outer diameter of the
gear 4d is larger than the outer diameter of the shaft member 4c to
effectively impart a driving force (rotation force) from a driving
part provided in the support part 5a to the gear 4d to transport
the medium (i.e., to rotate the spindle 4).
Note that, as represented in FIG. 2, the spindle 4 is set in the
setting part 2 such that the end part 4a on one side (-X direction
side) of the shaft member 4c in the axial direction is supported by
the support part 5a, and an end part 4b on the other side (+X
direction side) of the shaft member 4c in the axial direction is
supported by the support part 5b. The recording device 1 transports
the medium from the medium roll body supported by the spindle 4 set
in the setting part 2 to a medium transportation path (not
illustrated) in the recording device 1 (specifically, the medium is
transported to at least a position facing the head carriage 7). By
transporting the medium, the recording device 1 becomes a state in
which recording on the medium can be performed.
Here, a position in the spindle 4 at which the medium roll body is
set is a position between a flange part 4e and a flange part 4f. At
least one of the flange part 4e and the flange part 4f is movable
in the axial direction (X direction or -X direction) with respect
to the shaft member 4c and detachable from the shaft member 4c. In
addition, the spindle 4 is configured such that the medium roll
body can be positioned and fixed in the X direction by fixing a
paper tube in the roll body on which the medium has been wound to
paper tube fixing parts 8 of the flange part 4e and the flange part
4f (see FIG. 5 to FIG. 7 for the paper tube fixing part 8 of the
flange part 4e, and see FIG. 2 and FIG. 3 for the paper tube fixing
part 8 of the flange part 4f).
When the medium roll body is set in the spindle 4, or when the
medium roll body supported by the spindle 4 is replaced, etc., the
spindle 4 is detached from the setting part 2. The recording device
1 according to the example includes temporary placing parts 6
(temporary placing part 6a and temporary placing part 6b) for
temporary placing the spindle 4 detached from the setting part 2.
When the spindle 4 set in the setting part 2 in a state as
represented in FIG. 2 is detached, it is possible to once bring the
end part 4b into a pulled-out state toward the temporary placing
part 6b (the end part 4a is in a state of being supported by the
support part 5a), and then further bring the end part 4a into a
pulled-out state toward the temporary placing part 6a. That is,
since it is possible to pull out the ends of the spindle 4 one by
one, the recording device 1 according to the example is configured
such that a worker can easily move the spindle 4 from the setting
part 2 to the temporary placing part 6 by himself/herself.
Note that, to facilitate the movement of the spindle 4 (to make it
possible to roll and move the spindle 4) when the end part 4b of
the spindle 4 is moved from the support part 5b to the temporary
placing part 6b, a gentle slope 14 is formed between the support
part 5b and the temporary placing part 6b. Similarly, to facilitate
the movement of the spindle 4 (to make it possible to roll and move
the spindle 4) when the end part 4a is moved from the support part
5a to the temporary placing part 6a, a gentle slope 15 is formed
between the support part 5a and the temporary placing part 6a.
Next, the spindle 4, which is an important part of the recording
device 1 according to the example, will be described in detail.
Here, FIG. 3 is a schematic perspective view of the entirety of the
spindle 4 of the recording device 1 according to the example.
In addition, FIG. 4 to FIG. 6 are schematic perspective views of
part of the spindle 4 (the end part 4a on one side of the shaft
member 4c in the axial direction) of the recording device 1
according to the example. Among these figures, FIG. 4 is an
enlarged view of the end part 4a in FIG. 3, FIG. 5 represents a
state changed from the state in FIG. 4 in that the gear 4d has been
detached, and FIG. 6 represents a state changed from the state in
FIG. 5 in that a spacer member 12 (ring-shaped and
flat-plate-shaped metal washer) has further been detached.
In addition, FIG. 7 is a schematic perspective view of the gear 4d
of the spindle 4 of the recording device 1 according to the
example, and is a perspective view in which the shaft member 4c is
cut and the gear 4d is viewed from the +X direction side.
In addition, FIG. 8 is a schematic cross-sectional view of the end
part 4a of the spindle 4 of the recording device 1 according to the
example.
In addition, FIG. 9 and FIG. 10 are enlarged schematic
cross-sectional views of a fixing part 10 of the spindle 4 of the
recording device 1 according to the example, the fixing part 10
being a part to which the shaft member 4c and the gear 4d are
fixed, and the fixing part 10 being cut at different positions in
respective views.
In addition, FIG. 11 is a schematic view for describing a spring
pin 20 used in the spindle 4 of the recording device 1 according to
the example.
Note that, in FIG. 3 to FIG. 11, although the representations are
made in reference to a state in which the longitudinal direction of
the spring pin 20, which will be described later, is along the Z
direction (vertical direction), the arrangements along the Y
direction and the Z direction in FIG. 3 to FIG. 11 are merely
examples because the spindle 4 is rotated with the shaft member 4c
as an axial direction (X direction or -X direction).
As described above, the spindle 4 according to the example supports
and drives a roll body on which a sheet-shaped medium is wound, and
rotates the roll body. In addition, as represented in FIG. 3 and
the like, the spindle 4 according to the example includes the shaft
member 4c to be inserted into the roll body, and the gear 4d.
Here, the fixing part 10, which is a part in which the shaft member
4c and the gear 4d are fixed to each other, will be described.
The gear 4d is fixed to the tip side (see FIG. 6, etc.) of the
shaft member 4c in the axial direction. In addition, a spacer
member 12 (see FIG. 5, etc.) contacting both of the shaft member 4c
(tip 11) and the gear 4d is provided at a position between the tip
11 of the shaft member 4c and the gear 4d. Here, as can be
understood by comparing FIG. 5 with FIG. 6, the fixing part 10
according to the example is configured such that, in the axial
direction (X direction or -X direction) of the shaft member 4c, the
contact area of the spacer member 12 and the gear 4d is larger than
the contact area of the tip 11 of the shaft member 4c and the
spacer member 12 (i.e., the contact area of the tip 11 of the shaft
member 4c and the gear 4d in a case that the shaft member 4c and
the gear 4d contact with each other with no intervention of the
spacer member 12). That is, this configuration makes it possible to
reduce the load of the shaft member 4c applied to the gear 4d and
suppress the buckling of the gear 4d. Note that, in the example,
since the spacer member 12 is made of metal and the gear 4d is made
of resin, the spacer member 12 is made of a harder material than
that of the gear 4d. By making the spacer member 12 from a harder
material (e.g., having a larger Mohs hardness value) than that of
the gear 4d as described above, it is possible, in particular, to
effectively suppress the buckling of the gear 4d, but materials of
the spacer member 12 and the gear 4d are not particularly
limited.
In addition, in the fixing part 10, as represented in FIG. 4 to
FIG. 6, and the like, a coupling member 13 including a fixing
surface 13a for the gear 4d at the tip 11 side of the shaft member
4c is coupled to the gear 4d at the fixing surface 13a by a fixing
member 16 (screw 16a and screw hole 16b) in the axial direction of
the shaft member 4c. In addition, the shaft member 4c is coupled to
the coupling member 13 in an intersecting direction intersecting
the axial direction (X direction or -X direction) of the shaft
member 4c by the spring pin 20, which will be described later. That
is, the shaft member 4c and the gear 4d are fixed to each other via
the coupling member 13 along the axial direction of the shaft
member 4c, and by employing the configuration in which the shaft
member 4c and the gear 4d are fixed to each other along the axial
direction, the inclination of the shaft member 4c with respect to
the gear 4d is suppressed.
Thus, the spindle 4 according to the example is configured as not
to be deformed easily.
Note that the coupling member 13 may not be coupled to the gear 4d
by the screw 16a and the screw hole 16b. For example, it is
possible to provide the fixing surface 13a of the coupling member
13 with a convex part protruding in the axial direction, and
provide the gear 4d with a concave part engaging with the convex
part. In this case, it is preferable to provide the concave part of
the gear 4d with an E-shaped rib (squeezing rib). This makes it
possible, when the convex part of the fixing surface 13a is
inserted into the concave part of the gear 4d, to reliably engage
the convex part of the fixing surface 13a with the concave part of
the gear 4d by the squeezing rib being squeezed. Thus, it is
possible to position the gear 4d in the axial direction without the
coupling by the screw 16a and the screw hole 16b.
In other words, the recording device 1 according to the example
includes the thus-configured spindle 4 and the head carriage 7
serving as a recording part for performing recording on a roll body
supported by the spindle 4, and thus can perform recording on a
medium transported with high transportation accuracy.
Hereinafter, the fixing part 10 will further be described in
detail.
The spindle 4 according to the example includes the spring pin 20
serving as a penetration member penetrating through the shaft
member 4c and the coupling member 13. As represented in FIG. 7 and
the like, the gear 4d includes an insertion part 17 into which an
outer circumferential part 18 of the shaft member 4c including the
tip 11 is to be inserted. As represented in FIG. 9, FIG. 11, and
the like, the shaft member 4c includes a first through-hole 19
penetrating in the intersecting direction intersecting the axial
direction of the shaft member 4c at a section on the outer
circumferential part 18 to be inserted into the insertion part 17.
As represented in FIG. 9, FIG. 10, and the like, the coupling
member 13 includes a second through-hole 13c penetrating in the
intersecting direction on side surfaces 13b intersecting the fixing
surface 13a, and is arranged such that the second through-hole 13c
is housed inside the shaft member 4c. In addition, as represented
in FIG. 5 to FIG. 8, the spring pin 20 protrudes from the first
through-hole 19 to the outer circumferential part 18, and
penetrates through both of the first through-hole 19 and the second
through-hole 13c. In addition, as represented in FIG. 7, FIG. 8,
and the like, the insertion part 17 includes at least one groove 21
serving as a regulation part for regulating the movement, in the
rotation direction, of the roll body of the spring pin 20 protruded
from the first through-hole 19 to the outer circumferential part
18.
With this configuration, the spindle 4 according to the example can
position the coupling member 13 in the shaft member 4c with high
accuracy by using the spring pin 20. In addition, the spindle 4
according to the example is configured to make it possible to
effectively regulate the movement of the roll body of the spring
pin 20 with respect to the gear 4d in the rotation direction by
engaging the at least one groove 21 along the axial direction of
the shaft member 4c with the spring pin 20 protruded from the first
through-hole 19 to the outer circumferential part 18. That is, the
spindle 4 according to the example is configured to make it
possible to regulate the relative movement of the shaft member 4c
and the gear 4d to each other in the rotation direction of the roll
body, and reliably transmit a driving force (rotation force) from
the gear 4d to the shaft member 4c. Note that, although the
coupling member 13 according to the example is made of metal and
has a U-shape (approximate C-shape) formed by the fixing surface
13a and the two side surfaces 13b intersecting the fixing surface
13a, the material and shape of the coupling member 13 are not
particularly limited.
Here, as described above, the regulation part is the at least one
groove 21 along the axial direction of the shaft member 4c, and
thus, the movement of the shaft member 4c with respect to the gear
4d in the rotation direction of the roll body is effectively
regulated with the simple configuration.
In addition, describing the fixing part 10 from a different point
of view, in the fixing part 10 according to the example, the shaft
member 4c is coupled to the coupling member 13 by making the spring
pin 20 penetrate through the first through-hole 19 formed in the
shaft member 4c and the second through-hole 13c formed in the
coupling member 13. In addition, the coupling member 13 is coupled
to the gear 4d by engaging, from outside (-X direction side), the
screw 16a with the screw hole 16b, formed in the coupling member
13, with the gear 4d interposed therebetween. By fastening the
screw 16a to the screw hole 16b in this state, the gear 4d is
coupled to the shaft member 4c on the +X direction side via the
coupling member 13, and the shaft member 4c and the gear 4d are
fixed to each other in the X direction. In addition, the spring pin
20 protrudes from the outer circumferential part 18 of the shaft
member 4c, and, by the protruded part being housed in the at least
one groove 21 along the axial direction (X direction or -X
direction) of the shaft member 4c, the shaft member 4c and the gear
4d are fixed to each other also in the rotation direction of the
roll body (the movement of the shaft member 4c with respect to the
gear 4d in the rotation direction of the roll body is
regulated).
Next, further describing the spring pin 20 serving as a penetration
member in detail, the spring pin 20 according to the example is
formed by rounding a metal plate having elasticity, and uses the
spring action of the cylindrical shape in a radial direction
intersecting the axial direction. As represented in FIG. 11, the
spring pin 20 has a cylindrical shape, and a gap (space part 20a)
is formed in the circumferential surface 20b along the longitudinal
direction. With this configuration, the spring pin 20 according to
the example can change the outer diameter thereof.
In addition, specifically, an outer diameter L1 of the spring pin
20 in a state in which the spring pin 20 is not penetrating through
the first through-hole 19 and the second through-hole 13c is larger
than an inner diameter L2 of the first through-hole 19. In
addition, by making the spring pin 20 penetrate through (by pushing
the spring pin 20 into) the first through-hole 19 and the second
through-hole 13c, the outer diameter of the spring pin 20 becomes
equal to the inner diameter L2 of the first through-hole 19. With
this configuration, the spring pin 20 is positioned in the first
through-hole 19 with high accuracy and the gear 4d is positioned
with respect to the shaft member 4c with high accuracy (the
position shift of the shaft member 4c with respect to the gear 4d
is suppressed).
In other words, the spring pin 20 according to the example has a
larger outer diameter in a state in which the spring pin 20 is not
penetrating through the first through-hole 19 and the second
through-hole 13c than an outer diameter in a state in which the
spring pin 20 is penetrating through the first through-hole 19 and
the second through-hole 13c. In other words, the spring pin 20
according to the example has a larger outer diameter in a state in
which the spring pin 20 is not inserted into the first through-hole
19 and the second through-hole 13c than an outer diameter in a
state in which the spring pin 20 is inserted into the first
through-hole 19 and the second through-hole 13c.
By providing the fixing part 10 with this configuration, the
spindle 4 according to the example is configured to make it
possible to easily position the gear 4d with respect to the shaft
member 4c with high accuracy by the spring pin 20.
Note that the invention is not intended to be limited to the
aforementioned examples, and many variations are possible within
the scope of the invention as described in the appended claims. It
goes without saying that such variations also fall within the scope
of the invention.
This application claims priority under 35 U.S.C. .sctn. 119 to
Japanese Patent Application No. 2018-031639, filed Feb. 26, 2018.
The entire disclosure of Japanese Patent Application No.
2018-031639 is hereby incorporated herein by reference.
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